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[FR] Add documentation for invoices (#16659)
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sdk/formrecognizer/Azure.AI.FormRecognizer/samples/Sample10_RecognizeInvoices.md
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| # Recognize invoices | ||
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| This sample demonstrates how to recognize and extract common fields from invoices, using a pre-trained model. For a suggested approach to extracting information from invoices, see [strongly-typing a recognized form][strongly_typing_a_recognized_form]. | ||
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| To get started you'll need a Cognitive Services resource or a Form Recognizer resource. See [README][README] for prerequisites and instructions. | ||
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| ## Creating a `FormRecognizerClient` | ||
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| To create a new `FormRecognizerClient` you need the endpoint and credentials from your resource. In the sample below you'll use a Form Recognizer API key credential by creating an `AzureKeyCredential` object, that if needed, will allow you to update the API key without creating a new client. | ||
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| You can set `endpoint` and `apiKey` based on an environment variable, a configuration setting, or any way that works for your application. | ||
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| ```C# Snippet:CreateFormRecognizerClient | ||
| string endpoint = "<endpoint>"; | ||
| string apiKey = "<apiKey>"; | ||
| var credential = new AzureKeyCredential(apiKey); | ||
| var client = new FormRecognizerClient(new Uri(endpoint), credential); | ||
| ``` | ||
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| ## Recognize invoices from a URI | ||
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| To recognize invoices from a URI, use the `StartRecognizeInvoicesFromUriAsync` method. | ||
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| ```C# Snippet:FormRecognizerSampleRecognizeInvoicesUri | ||
| var options = new RecognizeInvoicesOptions() { Locale = "en-US" }; | ||
| RecognizedFormCollection invoices = await client.StartRecognizeInvoicesFromUriAsync(invoiceUri, options).WaitForCompletionAsync(); | ||
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| // To see the list of the supported fields returned by service and its corresponding types, consult: | ||
| // https://aka.ms/formrecognizer/invoicefields | ||
| RecognizedForm invoice = invoices.Single(); | ||
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| FormField invoiceIdField; | ||
| if (invoice.Fields.TryGetValue("InvoiceId", out invoiceIdField)) | ||
| { | ||
| if (invoiceIdField.Value.ValueType == FieldValueType.String) | ||
| { | ||
| string invoiceId = invoiceIdField.Value.AsString(); | ||
| Console.WriteLine($" Invoice Id: '{invoiceId}', with confidence {invoiceIdField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField invoiceDateField; | ||
| if (invoice.Fields.TryGetValue("InvoiceDate", out invoiceDateField)) | ||
| { | ||
| if (invoiceDateField.Value.ValueType == FieldValueType.Date) | ||
| { | ||
| DateTime invoiceDate = invoiceDateField.Value.AsDate(); | ||
| Console.WriteLine($" Invoice Date: '{invoiceDate}', with confidence {invoiceDateField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField dueDateField; | ||
| if (invoice.Fields.TryGetValue("DueDate", out dueDateField)) | ||
| { | ||
| if (dueDateField.Value.ValueType == FieldValueType.Date) | ||
| { | ||
| DateTime dueDate = dueDateField.Value.AsDate(); | ||
| Console.WriteLine($" Due Date: '{dueDate}', with confidence {dueDateField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField vendorNameField; | ||
| if (invoice.Fields.TryGetValue("VendorName", out vendorNameField)) | ||
| { | ||
| if (vendorNameField.Value.ValueType == FieldValueType.String) | ||
| { | ||
| string vendorName = vendorNameField.Value.AsString(); | ||
| Console.WriteLine($" Vendor Name: '{vendorName}', with confidence {vendorNameField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField vendorAddressField; | ||
| if (invoice.Fields.TryGetValue("VendorAddress", out vendorAddressField)) | ||
| { | ||
| if (vendorAddressField.Value.ValueType == FieldValueType.String) | ||
| { | ||
| string vendorAddress = vendorAddressField.Value.AsString(); | ||
| Console.WriteLine($" Vendor Address: '{vendorAddress}', with confidence {vendorAddressField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField customerNameField; | ||
| if (invoice.Fields.TryGetValue("CustomerName", out customerNameField)) | ||
| { | ||
| if (customerNameField.Value.ValueType == FieldValueType.String) | ||
| { | ||
| string customerName = customerNameField.Value.AsString(); | ||
| Console.WriteLine($" Customer Name: '{customerName}', with confidence {customerNameField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField customerAddressField; | ||
| if (invoice.Fields.TryGetValue("CustomerAddress", out customerAddressField)) | ||
| { | ||
| if (customerAddressField.Value.ValueType == FieldValueType.String) | ||
| { | ||
| string customerAddress = customerAddressField.Value.AsString(); | ||
| Console.WriteLine($" Customer Address: '{customerAddress}', with confidence {customerAddressField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField customerAddressRecipientField; | ||
| if (invoice.Fields.TryGetValue("CustomerAddressRecipient", out customerAddressRecipientField)) | ||
| { | ||
| if (customerAddressRecipientField.Value.ValueType == FieldValueType.String) | ||
| { | ||
| string customerAddressRecipient = customerAddressRecipientField.Value.AsString(); | ||
| Console.WriteLine($" Customer address recipient: '{customerAddressRecipient}', with confidence {customerAddressRecipientField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField invoiceTotalField; | ||
| if (invoice.Fields.TryGetValue("InvoiceTotal", out invoiceTotalField)) | ||
| { | ||
| if (invoiceTotalField.Value.ValueType == FieldValueType.Float) | ||
| { | ||
| float invoiceTotal = invoiceTotalField.Value.AsFloat(); | ||
| Console.WriteLine($" Invoice Total: '{invoiceTotal}', with confidence {invoiceTotalField.Confidence}"); | ||
| } | ||
| } | ||
| } | ||
| ``` | ||
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| ## Recognize invoices from a given file | ||
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| To recognize invoices from a given file, use the `StartRecognizeInvoicesAsync` method. | ||
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| ```C# Snippet:FormRecognizerSampleRecognizeInvoicesFileStream | ||
| using (FileStream stream = new FileStream(invoicePath, FileMode.Open)) | ||
| { | ||
| var options = new RecognizeInvoicesOptions() { Locale = "en-US" }; | ||
| RecognizedFormCollection invoices = await client.StartRecognizeInvoicesAsync(stream, options).WaitForCompletionAsync(); | ||
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| // To see the list of the supported fields returned by service and its corresponding types, consult: | ||
| // https://aka.ms/formrecognizer/invoicefields | ||
| RecognizedForm invoice = invoices.Single(); | ||
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| FormField vendorNameField; | ||
| if (invoice.Fields.TryGetValue("VendorName", out vendorNameField)) | ||
| { | ||
| if (vendorNameField.Value.ValueType == FieldValueType.String) | ||
| { | ||
| string vendorName = vendorNameField.Value.AsString(); | ||
| Console.WriteLine($" Vendor Name: '{vendorName}', with confidence {vendorNameField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField customerNameField; | ||
| if (invoice.Fields.TryGetValue("CustomerName", out customerNameField)) | ||
| { | ||
| if (customerNameField.Value.ValueType == FieldValueType.String) | ||
| { | ||
| string customerName = customerNameField.Value.AsString(); | ||
| Console.WriteLine($" Customer Name: '{customerName}', with confidence {customerNameField.Confidence}"); | ||
| } | ||
| } | ||
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| FormField invoiceTotalField; | ||
| if (invoice.Fields.TryGetValue("InvoiceTotal", out invoiceTotalField)) | ||
| { | ||
| if (invoiceTotalField.Value.ValueType == FieldValueType.Float) | ||
| { | ||
| float invoiceTotal = invoiceTotalField.Value.AsFloat(); | ||
| Console.WriteLine($" Invoice Total: '{invoiceTotal}', with confidence {invoiceTotalField.Confidence}"); | ||
| } | ||
| } | ||
| } | ||
| ``` | ||
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| To see the full example source files, see: | ||
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| * [Recognize invoices from URI](https://github.com/Azure/azure-sdk-for-net/blob/feature/formrecognizer2.1/sdk/formrecognizer/Azure.AI.FormRecognizer/tests/samples/Sample13_RecognizeInvoicesFromUri.cs) | ||
| * [Recognize invoices from file](https://github.com/Azure/azure-sdk-for-net/blob/feature/formrecognizer2.1/sdk/formrecognizer/Azure.AI.FormRecognizer/tests/samples/Sample13_RecognizeInvoicesFromFile.cs) | ||
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| [README]: https://github.com/Azure/azure-sdk-for-net/tree/master/sdk/formrecognizer/Azure.AI.FormRecognizer#getting-started | ||
| [strongly_typing_a_recognized_form]: https://github.com/Azure/azure-sdk-for-net/tree/master/sdk/formrecognizer/Azure.AI.FormRecognizer/samples/Sample4_StronglyTypingARecognizedForm.md |
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